Dust-collector.



I. STEINBR.

DUST COLLECTOR.

APPLICATION FILED JANA, 1910.

Patented Aug. 16, 1910.

INVENTOR \SHDOR STEINER,

WlTNESSES:

ATTORNEY UNITED STATES PATENT OFFICE.

ISIIDOB STEINEB, OI MUNICH, GERMANY.

DUST-COLLECTOR.

Specification of Letters Patent.

Patented Aug. .16, 1910.

Application fled January 3, 1810. Serial No. 538,158.

I treating and cleaning grain, principally malt.

It relates further to one part of a compound apparatus, which consistsas a whole of three arts, a separator in which the grain is :treed fromthe combs, a second device called the aspirator, and a third device thedust-collector The first, or separator has been applied for by me, underdate of July 26th, 1909, and Serial No. 508653, and the second, oraspirator, forms the subject matter of an application filed on the 3rdday of Jan. 1910, Serial No. 536,152.

The present invention relates specifically to the apparatus called thedust-collector into which the air current, laden with the combs and dustparticles, passes, with the result that the latter are completelyseparated from the air current, so that the air leaves the dustcollector in a purified condition.

In the drawings: Figure 1 is a side elevation of the entire apparatusconsisting of the three parts, separator, aspirator, and dust collector.Fig. is a vertical section through the dust collector. Fig. 3, a planview of the same, and Fig. 4;, a cross section on the section line X-X,of Fig. 2.

The grain is introduced into the apparatus S at the opening 0?, andautomatically reaches the aspirator A through the pipe e after beingpolished and freed from the combs. The completely cleaned grain leavesthe aspirator at f, while the combs and particles of dust are suckedaway and carried ofl to the dust-collector 1, through a pipe 9, by anair current provided in an exhauster, or the like, not shownin detail,which is driven, for example, by an electric motor to be coupled up ath. The combs and dust particles, are separated from the air current 1nthe dust collector 1, and fall through the pipe 2' below, while thepurified air leaves at 6 at the top.

Grain cleaning machines and apparatus for the separation from an aircurrent of combs, dust and the like are already known, in which the aircurrent is conducted tangentially into a vessel provided with a centralof the air current circulatin outlet pipe, in such a Wa that on circlingaround t e outlet pipe, t e heavy particles are thrown outward bycentrifu a1 force and separated by their own weig t, while the purifiedair leaves the central outlet pipe. Further apparatus for separatingdust are also known in which the upper part of the vesisel is provided,instead of with a tangent1a turbme, and the air current containing dustor the like thus enters the vessel tangentially, so that in this casethe above described eifect is essentially obtained. The

arrangement of a cylinder provided with guiding vanes before the airoutlet of the vessel 1s also known for the purpose of dividing thecurrent up and carrying it to the outlet pipe.

The heavy particles are separated (in a known manner) by the centrifugalforce in the outer funnel shaped vessel 1, (Fig. 2) but at the same timethe above described device insures that by diminishing the velocity ofthe air as much as possible on passing from the outer to the innervessel an opportunity is given to the finer and lighter particles ofseparating by means of their own weight. It is essential in this casethat the turbine-like vanes of the inner cylinder be arranged in such amanner that the air supplied to the outer vessel and circulating aroundthe lnner vessel. exerclses a sucking motlon. As, however, the air mustnecessarily pass from the outer vessel to the in ner vessel between theturbine-like vanes, no other way being open to it, the velocity of theair on passing through is almost entirely destroyed by the suckingaction produced between the vanes, so that the smallest vess

In the form shown, by way of example,

in Figs. 2, 3 and 4, the air containing combs particles are separated inthe inner e and particles of dust and having a suitable veloclty issupplied at 2 through the tangential pipe 3 to the above mentionedvessel 1, so that a current circulating around the inner cylinder 4 isfirst produced. The inner cylinder, as already mentioned above, is

provided along its .whole length and on its whole circumference withtransverse walls 5 (Fig. 2) curved in the manner of turbine vanes, whichare so arranged that by means tion of the arrow shown in ig. 4:, the aircontained in the interior of the cylinder ipe, with vanes similar tothose of a 65 in the direcwould be sucked outward. As, however, the

I air is being continually, supplied to the vessel 1, it must esca throuh the vanes to the interior of t e cylin er and thence through thepipe6. As the air asses be tween the vanes its velocity is lminished to suchan extent or destroyed, by the sucking action described above, that thecombs and dust particles are completely separated, as has been proved byex eriment. These articles first fall through t e funnel-shaped bottomof the cylinder 4, and thence throu h the o ening provided at the bottomof't e cylind er 1 together with the particles already separated, andfall into a suitable receiver or into a pipe through which the areremoved either alone or together wit the coarser particles conve edthither b the worm in the pipe is. The unnel shap bottom has only asmall central opemn for the dust to fall through, and the small size .ofsaid opening prevents any appreciable amount 0 air from esc'apin throughit:

almost the entire volume of air entering the vessel 1 being thuscompelled to pass through the walls 'of the cylinder 4. The regularitysemen of {low through the vanes 5 is insured by the cylindrical form mwhich the are grouped.

The particular advantage 0 this arrangement consists, on the one hand,in the fact a that the apparatus does not require .any power, and, onthe other hand, that the degree of separation can be regulated asrequired by suitablydetermining the curvature of the vanes and velocityof entrance. 3

Having thus fully illustrated and described my invention, what I claim,is:

A dust collector, com rising an outer vessel, a cylinder provided withvanes inclosed within said vessel, an air tube communicat- 4(

